Cornish roll.



No. 705,749. Patented July 29, I902.

A. J. GATES.

CORNISH ROLL.

(Application filed July 29, 1901.) (No Model.) 2 Sheets-Sheet l.

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Patented July 29, 902.

A. J. GATES.

COBNISH BULL.

(Application filed July 29, 1901.)

2' Sheets-$heet 2.

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UNITED STATES PATENT CFFICE.

ALBERT J. GATES, oE CHICAGO, 1L mo1s, AssiCNoE To ALLIS-CHALMERS COMPANY, OF JEEsEY CITY, NEWJERSEY,ACORPORATION or NEW JERSEY. I

ooRNis H ROLL.

SPECIFICATION forming partof Letters Patent No. 705,749, dated July. 29, 1902. Application filed July 29, 1901.1 Serial. No. 70,050. (No modem T (ZZZ 00 1'2 y concern: It is evident that the oftener the rolls are Beitknown that I, ALBERT J. GATES, aoitiadjusted with reference to one another the zen of the United States, residing at Chicago, less liability there is of the shells grooving, in the county of Cook and State of Illinois, and as this character of machine is largely 5 have invented certain new and useful Im- I used in operations where they run practically provements in Cornish Rolls, of which the continuously it is essential that the means following is a specification. 7 for adjusting be such that the operation can This invention relates to that class of rolls take place while the machine is in motion. which are known as Cornish. rolls, used for T In illustrating and describing this invento the purpose ofgrinding or reducing ores and tion I have only illustrated and described similar materials to a condition of great fine-, that which I consider to be new, taken in conness; and it has particular relation to the nection with so much as is old as will propmeans for adjusting one or both of the rolls erly disclose the invention to others and enwith relation to each other, all of which will able those skilled in the art to practice the i 5 more fully hereinafter appear. r A same, leaving out of consideration other and The object of the invention is to provide well-known parts, which if shown and de- Cornish rolls with simple, economical, and efscribedin unnecessary detail would only tend ,ficient means by which one or both of the to prolixity, confusion, and ambiguity.

shafts thatoarry the rolls maybe adjusted In constructing a crushing-roll in accord 2o longitudinally; andthe invention consistsin ance with these improvements a frame por- A the features, combinations, and detailsof con-, tion a of the desired size, shape, and strength struction hereinafter described and claimed: to hold the parts in position isprovided and In the accompanying drawing's,-Figure l is which can be made in one or more parts, as a longitudinal sectional elevation of one of may seem desirable. Mounted in suitable 25 the roll shafts of a Cornish roll constructed .bearing-blocksh in turn adjustably mounted in accordance with thesejimprovements; and, in this frame portion, is a pair of roll shafts c, Fig. 2 an enlarged longitudinal sectional elje carrying thecrushing-rolls composed of the vation of one end of one of the roll-bearing f shells d and the centers 6, which are. secured shafts, showing the adjustingmechanism. to the shaft Ciri the usuaLwell-known man- 30 In the art to which this invention relates it ner. The lateral thrustimpar-ted to the shaft is well known that the roll-centers aresur: bythe pressure on the materialbeing crushed faced with shells or tiresofsome hard mateby theridges and grooves necessitates that rial calculated to resist great wear, but that the adjusting mechanism be of such characafter a certain period of usage these crushter 'as-to withstand this heavy pressure with 35 ing-surfaces become grooved and the efiithe development of the least possible amount ciency of the mechanism thereby greatlyim of frictional resistance, and therefore in order paired, as well as the life of the shell or tire to accomplish the results above enumerated greatly lessened, all of which will be apprein the manner suggested the end of one or ciated by those skilled in the art. both of the roll-shafts that does not carry the 9o 40 To restore the efficiency of the machine, it driving pulley or gear is screw-threaded, as is necessary to grind or turn the shells so atf, and mounted upon this screw-threaded that the faces of the two rolls shall be smooth end, as shown particularly in Fig. 2, is a and parallel with one another, or to arrange thrust-collar g, having a radially-extending one roll-shaft so that it maybe adjusted latflange portion h.- This thrust-collar, as above 9 45 orally to the other, or to arrange both shafts suggested and as can be readily seen from an so that they may be adjusted laterally to each examination of the drawings, has its internal other, thus allowing-of bringing the ridges in bore screw-threaded to engage with the screw one of the .rolls opposite the grooves in the threads on the end of the roll'shaft and is so other. roll, thereby causing the ridges to wear constructed and arranged that its inner end 10c 50 down and straightening the face of the rolls abuts against a shoulder i on the roll-shaft.

with one another. To prevent this thrust-collar from turning,

or, in other words, to lock it Securely in the desired position, a gib-keyj is provided and driven into a slot, formed half-way in each of the threaded portions of the roll-shaft and thrust-collar, so that after both such parts are placed in engaging position and the gibkey driven in'independent rotation of such parts is rendered impossible. To lock this gib-key in position, a cap-screw 7c is provided and inserted through a perforation in the head of the key, so as to have a threaded engagement with that particular end of the shaft, as shown in Fig. 2.

To provide means for taking the thrust of the thrust-collar, and thereby hold the rollshaft and other parts in position, a ring-nutl is provided of the relative size and shape shown in Fig. 2, the inner end of which is screw-threaded, so as to engage with a threaded portion m on the bearing-box. This ringn ut has an inwardly-projecting annular shoulder or flange at, extending inwardly to about the diameter of the hub g of the thrust-collar, so as to furnish a wearing-surface against which the inward thrust is taken. To take up the thrust in the opposite direction, the

outer end of the ring-nut is bored and threaded of a diameter larger than the diameter of the flange on the thrust-collar, so that such collar may be placed in or removed from po-- sition at any time without disturbing the entire ring-nut, and a plate-nut o is provided and inserted in the threaded opening thereof. (See Fig. 2.)

In order to provide for minimizing the frictional resistance and secure minimum wear of the parts, a pair of wearing-rings p is provided of a diameter substantially equal to that of the flange on the thrust-collar, one of which is placed between one face of the thrustcollar flange h and the inwardly-extending inner flange n of the ring-nut and the other between the outside face of the flange h of the thrust-collar and the plate-nut 0. The ad vantages of such a construction and arrangement will be readily appreciated by those skilled in the art, first, because it provides the minimum frictional resistance and weal ing of the parts, and, second, because it permits the rotation of the ring-nut upon its threaded bearing m on the shaft-journal box, thereby permitting the moving or adjusting of the thrust-collar with its roll-shaft longitudinally without disturbing any of the other parts.

It is highly desirable that some means be provided to lock the plate-nut 0 in its position, and to accomplish this result a plate-nut latch r is provided, having one end engaging with one of a series of slots or grooves 51 in the ring-nut and the other end engaging with a slot or groove 25 in the plate-nut 0, as shown particularly in Fig. 1, while a stud or bolt 11 serves to lock and keep the parts in such engagement until it is desired to change the relative position. It will be understood that thelatch may be placed in engagement with any one of these grooves s, so that the platenut may be locked in one of a number of different positions, and thereby obtain the desired amount of play between the thrust-collar and the wearing-rings.

It willbe seen that when the parts described are locked in the position shown in Fig. 1 by turning the ring-nut Z by using a lever in the recesses therein the thrust collar, with its roll-shaft, is moved longitudinally inwardly or outwardly. It becomes desirable, therefore, to lock the ring-nut Z in its desired position. To accomplish this result, the journal-box, or, more properly speaking, the walls of the oil-well 1;, which form a portion of said journal-box, is provided with a dog w, arranged to engage with one of a series of grooves or slots w in the exterior periphery of the ring-nut Z, so that it can be locked in any desired position and retain the desired adjustment of the roll-shaft.

I 'claim- 1. In a Cornish roll, the combination of a shaft, a thrust-collar secured thereto at or near one end thereof, a ring-nut in engagement with the journal-box of the shaft and means for holding the thrust-collar rotatably in engagement with the ring-nut to take up the thrust thereof, whereby as such ring-nut is rotated and moved inwardly and outwardly the thrust-collar is likewise moved, carrying with it the shaft and roll, substantially as described.

2. In a Cornish roll, the combination of a roll-shaft, a thrust collar engaged therewith, a ring-nut surrounding the thrust-collar and having screw-threaded engagement with the frame of the machine, means for locking and holding the thrust-collar in rotatable engagement with the ring-nut used to sustain the thrust thereof, and means for locking and holding the ring-nut in desired engagement with the frame, substantially as described.

3. In a Cornish roll, the combination of a roll-shaft, a thrust-collar in engagement with one end thereof and provided with an annular flange, a ring-nut in threaded engagement with the frame of the machine and surround ing the thrust-collar, and a plate-nut in engagement with the other end of the ring-nut and forming in connection therewith a closure that holds the thrust-collar rotatably in position, substantially as described.

4. In a Cornish roll, the combination of a 5. In a Cornish roll the combination of a roll-shaft, a thrust-collar provided with an annular flange in engagement with one end of such roll-shaft, a ring-nut surrounding the thrust-collar having one end in threaded engagement with the frame of the machine and upon which it is rotated and adjusted, a platenut adj ustably mounted in engagement with the other end of the ring-nut for confining and forming a closure for the thrust-collar to oonfineit therein and sustain the thrust thereof, means for holding the plate-nut in adj usted position, wearing rings interposed between the plate and fiangeof ring-nut and the flange of the thrust-collar, and means for locking the ring-nut in adjusted engagement with the frame, substantially as described.

6. In a Cornish roll, the combination of a roll-shaft, a thrust-collar provided with an annular flange in threaded engagement with one end thereof, a gib-key engaging a slot formed by and in the threaded portions of the roll-shaft and thrust-collar for holding such parts in the desired position, a ring-nut sur rounding the thrust-collar having one end in threaded engagement with the frame of the machine for the adjustment thereof, a platenut in threaded engagement with the other end of the ring-nut to complete the closure for and confine the thrust-ring, means for holding the plate-nut in adjustable engagement with the ring-nut, means for holding the ringnutin adjustable engagement with the frame, a wearing-ring interposed between the ringnut and the annular flange of the thrust-collar, and a wearing-ring interposed between the plate-nut and the annular flange of the thrust-collar, substantially as described.

ALBERT J. GATES. Witnesses:

ELMER E. HANNA, PHILETUS W. GATES. 

